So as a designer you are probably naturally a visual person. You flick though books and look at the pictures or do you use them for decor on your shelves?
A picture is worth a thousand words but as a designer you also need to grow your business and stay organized.
These books may help:
So you aren't a designer officially but you love interiors and style....
3. Interior Design Course: Principles, Practices, and Techniques for the Aspiring Designer